I'm a horrible texturer, so it would take me too long to make one myself (and end result would likely be horrible), so does someone know of any moss retextures that are free to use?

What kind of moss? Like, a ground texture? Or like the hanging moss in the Bitter Coast or something? If it's something simple, I could probably whip something up for you.

Hanging moss. I got a texture off the cgtextures and am trying something myself atm but whatever I do in GIMP turns to [censored]! I've been through several Vurt's stuff, is it spanish moss in all his packs or does he have some bigger, darker ones?

I don't know of any darker moss. I retextured the moss that hangs off Emperor Parasols in my http://www.nexusmods.com/morrowind/mods/42595/ but it's probably not what you're looking for. Do you have any photos you could link as examples?